Device for the separation of the wefts in multibox looms



Sept. 28, 1954 K. SCHWABE 2,690,195

DEVICE FOR THE SEPARATION OF THE WEFTS IN MULTIBOX LOOMS Filed Dec. 6, 1949 2 Sheets-Sheet 1 IN; 'EN TOR.

f/Mt LAW-J14. W

Sept, 28, 1954 SCHWABE 2,690,195

DEVICE FOR THE SEPARATION OF THE WEF'TS IN MULTIBOX LOOMS Filed Dec. 6, 1949 2 Sheets-$heet 2 IN V EN TOR.

Patented Sept. 28, 1954 DEVICE FOR THE SEPARATION OF THE WEFTS IN MULTIBOX LOOMS Kurt Schwabe, Le Locle, Switzerland Application December 6, 1949, Serial No. 131,373

Claims priority, application Switzerland December 7, 1948 V Claims. (Cl. 139170.6)

The invention relates to a device for the separation of the wefts in multiple box looms.

It is the principal object of the invention to overcome the difliculty arising in such looms which consists in that the wefts running from the edge of the fabric towards the various cells of the shuttle box often get slack owing to the up-and down-movement of the shuttle box, and are then caught by the wefts of that shuttle, which is being picked towards the other side of the loom, and are carried more or less deeply into the shed. Thereby so-called runners-in are formed which have to be sewn-out, a work which is often very difficult.

It is another object of the invention to provide a device capable of braking and of holdingfast the weft of the shuttle, which has run into a cell of the shuttle box, while the said shuttle box is being lowered or raised for the next pick, and which is capable of preventing any undesirable slackening of such weft during such movement of the shuttle box.

Other objects of the invention will appear from the description of an embodiment thereof later in .the specification.

According to a main feature of the invention, a device for the separation of the wefts in multiple box looms comprises in combination: a slay, a shuttle box having a plurality of cells on top of one another and slidably arranged on the said slay for bringing any one of the said cells into operative position, shuttles, each carrying a weft and arranged for being shot into and picked out of one of the said cells in the operative position thereof, and two brakingand holding devices for the stretches of the wefts running from the shuttles contained in the said cells towards the edge of the fabric, the said, slay being so arranged as to introduce by its movement the weft from the shuttle having arrived in its cell at the end of the preceding pick into one of the said, braking-' and holding devices when the said shuttle box is being lowered, and into the other one of the said brakingand holding devices when the said shuttle box. is being raised preparatory to the next subsequent pick.

In order that the invention may be better understood and readily carried into efiect, an embodiment thereof will now be described by way of example with reference to the accom- And while I illustrate and tions will occur to a person skilled in the art. In the drawings:

Fig. 1 shows an elevation of one end of the slay of a multiple box loom having a shuttle box with five cells and a device for the separation of the wefts as seen from the side of the fabric, partly in section.

Fig. 2 shows a section along the line A-A of Fig. 1, the rearmost position of the slay being shown in full lines, and the foremost position of the slay in dotted lines.

Fig. 3 is a plan view to Fig. 2, and Fig. 4 is a plan view corresponding to Fig. 3 of the slay in its rearmost position after the arrival of a shuttle in a cell of the shuttle box.

The slay sword of a multiple box loom (which is otherwise not shown) is denoted I. At the end of this slay sword I there is a shuttle box 3 having five cells 3a, 3b, 3c, 3d, 3e guided in a guide 2 so as to be shiftable up and down. In the case represented, in each of the cells 3a, 30 and 3e there is a shuttle 4a, 40, 4e, respectively, the wefts of which are denoted 5a, 50 and 56, whereas the cells 327 and 3d are shown empty for the sake of simplicity. On the guide 2 of the shuttle box 3 there is attached a so called partition plate 6, and on the slay sword I there is attached a slay plate 1. The partition plate 6 and the slay plate I, the outer edges 6 and l of which run obliquely towards the fabric, are connected with one another by a bolt 8. On the slay plate I there is moreover arranged an axle 9 on which a brush carrier I0 with two tufts of bristles II and H is rotatably and adjustably arranged. The tufts of bristles H and H are positioned obliquely to the directions of the warps and of the wefts, and, pointing towards the edge of the warp and towards the side of the fabric, they resiliently abut against the partition plate 6 and the slay plate 1, respectively. The slay plate I and the brush ll constitute a braking and holding device, and the partition plate 6 and the brush l l' constitute another braking and holding device for the wefts. The intermediate bottoms l2a, [2b, Md and He separating the cells 3a from 31), 3b from 30, 30 from 3d, and 3d from 3e, each have a recess 13a, 13b, l3d and 13a, respectively, on their front i. e. on the side pointing towards the fabric.

The shuttle runs into the associated cell of the shuttle box 3 when the slay sword I is approximately in its rearmost position. In Fig. 3 this position is shown in full lines, the cell 30 being in the operative position wherein the shuttle 40 has just run into the same. After the arrival 3 of the shuttle 4c in the cell 30 of the shuttle box 3, the following cases may arise:

(1) in the subsequent pick the shuttle 4c is again to be shot, towards the other side of the loom;

(2) in the subsequent pick the shuttle 4c is to be shot towards 'the .-other :side of the loom, i. e. the shuttle box 3 is to be moved upward;

(3) in the subsequent pick the shuttle 4a is to be shot towards the other side of the loom, i. e. the shuttle box 3 is to belowered.

In the first case, the weft 50 need not *be held fast, since it is to be carried at once ,into the shed again. In the second case, the shuttle box 3 is shifted upward immediately after the arrival of the shuttle 4c in its cell 3c, in such amanner that its cell 36 containing the shuttlei iearrives in the operative position. In the position of the slay sword I as shown in Fig. 3 .indotted lines this shifting of the shuttle box 3 is already accomplished. The weft .50 is thereby drawn into the recess [3d of the intermediate bottom [2d and is bent around its .base edge. Thereby the weft 5c is prevented from sliding ofi towards the centre of-the path'of the-slay. Inthe subsequent return movement .of the slay sword I into the position shown in Fig. 3 in full lines,'the weft 5c slides along .the oblique edge '6' of the partition plate 5 and is pulled under "the tuft of bristles 1 l by the downward pull. .As soon as this is effected, the weft 150 can getslaok no more inthe range of the width of the sheet of the loom, since it is held fast by the bristles of the brush l I, and it can not slide off towards .the sheet either, since this is prevented by the bristles of the brush H which are obliquely directed away from the sheet. At the subsequent- 1y eifected lowering of the shuttle box 3, the wefts 5a. and 5b running towards the upper cells .311 and 32) get somewhat slack, though, but'merely on the stretch between the tuft of bristles I I and the recess 13a or l3b of the intermediate bottoms IM and 121), respectively, so that in no case they can be caught and carried-.withbythe shuttle entering the cell.

Correspondingly, the same happens, ;when, according to'the third case, the shuttlebox 3 is not raised but is lowered, sothat its cell 3a.;containing the shuttle to gets into the operative .position; the only difference is that theweft Ecslides subsequently along the oblique edge I .of the slay ,plate i and gets under the bristles of the tuft ll.

When now the shuttle which is. actually in-the operative position, i. e. either 746 or la, is-picked out of itscell towards the other side of ;the loom, its weft 50 or 5a, respectively, :is slung-around the bristlesofthe tuft H or t l, respectively, and ispulled out from underneaththe tuft of bristles H or H, respectively, because the bristles -of the tuft II or II, respectively, are directedtowards the edge of the'warp anddo notoffergany resistance to that movement.

What I claim as my invention and desire to secure by Letters Patent,.is:

.1. A device for the separation-of .the wefts in multiple box looms for weaving a .fabric, .comprising in combination, .a slay; a shuttle box having a plurality of .cells .locatedon-topof one another slidably. arrangedon said-slayrfor bringing-.anyonemf said cells into operativeposition; aplurality of shuttles, each shuttle carrying .a weftand arranged'for being shotinto and,picke d out of .said .cellsin ,the operative ,position thereof, .and two .brakingand holding .devices located 4 on said slay and resiliently engaging the portions of the wefts running from the shuttles contained in said cells toward the edge of the fabric, one of said two braking and holding devices including a slay plate attached to said slay below .the pathof the shuttles and a brush resiliently abutting with a tuft of bristlesfrom above against said slay plate, and the other of said two both saidtufts of bristles being positioned obliquely to the directions of the warps and of thezwefts of-ithefabric, respectively, and pointing towards the fabric, said slay being arranged for x-introduei-ng by its movement the weft from the "shuttle having arrived in the corresponding cell of the preceding pick into one of said braking devices when said shuttle box is being lowered, and into therotheronev ofsaid .two braking and holding deviceswhensaidshuttlebox is being raised.

.2., A .dev.ice .for the separation of the wefts in multiple ,boxlooms for'weaving a fabric, comprising ,in combination, a slay; a shuttle box slidably arranged vonsaidslay and including a pluralityofparallel spacedbottom walls defining a plurality of cells located on top of one another, each of saidibottom walls having a recess in the edge thereof adjacent to said slay and guiding the Weft of a shuttle located in the corresponding .cell .during shifting of said shuttle box for bringing any one of said cells into an operative position; a plurality of shuttles, each shuttle carryinga wait and arranged for being shot into and picked outof said cells in theoperative position'thereoji. and two braking and holding devices located on saijdslay sand resiliently engaging the portions of the ,weftsrunning from the shuttles contained in said cells toward the edge of the fabric, one of ,saijd'twoibraking and holding devices includin a slay plate attachedtosaid slay below thepath of ,the shuttles ,andabrush resiliently abutting with a'tuft ofibristles from above against said slay plate, and the other of said two holding devices including a partition plate attachedito said slay above the path of .the shuttles and'afbrush'resiliently abutting with a tuft ofibristles from'below against saidpartitionplate, both said tufts of bristles being positioned obliquely to 'the'directions of the warps and of the wefts of'the'fabric, respectively, and pointing towards 'thefabri said slay being arranged for introducing ,by .its movement the weftfrom the shuttlehaving rarrived in the corresponding cell ofl'the preceding pick into one of said braking devices whensaid shuttle .box is being lowered, and intothaother one ,of said two brakingand holding devices when said shuttle box is being raised.

13. A .device'for.theseparationof .the wefts in multiple ,box lloomsjfo'r .weaving ;a fabric, .,com-- prising incombination, aslay; a shuttle box slidably,:arranged on said slay andincluding a plurality of parallelspacedlbottorn wallsdefining a plurality of cells 'llocatedon top ofoneanother,

,each of said bottom walls having a recess in the edgethereofadjacentto said slay and guiding the weft of,a shuttlelocate'din the corresponding cell during shifting ofsaid shuttle box for bringing any one ofsaid cellsinto an operative position; apluralityof shuttles, .eachcarrying a weft and arrangedjfor'beingshotjinto andpicked outof one of 1the;said cells T in' the operative position thereof and" two" braking handiholding devices mounted on said slay for the stretches of the wefts running from the shuttles contained in the said cells towards the edge of the fabric, the said slay being arranged for introducing by its movement the weft from the shuttle having arrived in its cell at the end of the preceding pick into one of the said braking and holding devices when the said shuttle box is being lowered, and into the other one of the said braking and holding devices when the said shuttle box is being raised, preparatory to the next subsequent pick.

4. A device for the separation of the wefts in multiple box looms as claimed in claim 1 comprising a common brush holder rotatably and adjustably arranged on the said slay plate and adapted to carry both the said tufts of bristles.

6 5. A device for the separation of the wefts in multiple box looms as claimed in claim 1 wherein the said slay plate and the said partition plate each comprises on their outer side an edge portion directed obliquely towards the fabric and serving for guiding the wefts into the respective braking and holding device.

References Cited in the file of this patent Hamilton et al July 15, 1952 

